(AP Photo/Kamran Jebreili)

Two B.C. oyster farms closed by norovirus

Officials report 40 cases of the illness in the past month after people had eaten raw oysters

Health officials in British Columbia have closed two oyster farms amid an investigation into another outbreak of norovirus linked to the consumption of raw oysters.

The BC Centre for Disease Control says there have been about 40 cases of the acute stomach upset since early March and all those who became ill reported eating raw oysters from B.C.

READ MORE: Tofino faces shellfish closures after norovirus outbreak hits 120

READ MORE: Ocean currents tied to B.C. norovirus outbreak: CDC

The centre says laboratory testing confirms the presence of norovirus in some of the cases and the illness is suspected in the rest of those who have become ill.

An exact source of the contamination has not been determined but the centre says human sewage in seawater is the most likely cause.

Nearly 350 cases of norovirus linked to raw or undercooked B.C. oysters were reported in B.C., Alberta and Ontario starting in late 2016 and continuing through early 2017, forcing the closure of 13 oyster farms on the B.C. coast.

That outbreak was declared over in April 2017, and an article published the British Columbia Medical Journal last June determined sewage spread by ocean currents caused the widespread contamination.

Researchers concluded the outbreak disproved claims that shellfish is safe to eat between September and April, and noted that bacteria, viruses and biotoxins persist in cold sea water year-round.

The centre says it does not recommend eating raw oysters and advises the shellfish should be cooked to an internal temperature of 90 C for 90 seconds to kill pathogens.

The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Giesbrecht pleads not guilty in murder trial

Giesbrecht, 67, faces 1st-degree murder of Raymond Bishop, found May 2017 south of Francois Lake.

Bulkley Valley SD 54 superintendent leaving

Chris van der Mark has been superintendent with SD54 for eight years, and has hands full in Cariboo.

Council wants culture centre referendum

Library/gallery gets extra grant scrutiny for passing $10-million threshold.

B.C. chiefs show solidarity with Wet’suwet’en hereditary chiefs

Chiefs from around B.C. outside the Coastal GasLink pipeline route in Smithers show support.

The North Matters looks to open Bulkley Valley chapter

Group promoting resource development meets in Smithers.

VIDEO: U.S. Congress to probe whether Trump told lawyer Cohen to lie

At issue is a BuzzFeed News report that about negotiations over a Moscow real estate project

Rookie Demko backstops Canucks to 4-3 win over Sabres

Young Vancouver goalie makes 36 saves to turn away Buffalo

Charges upgraded against mother of murdered B.C. girl

Kerryann Lewis now faces first- rather than second-degree murder in the death of Aaliyah Rosa.

UPDATE: Injured firefighter in stable condition

Kelowna fire crews responded to a blaze at Pope’sGallery of BC Art & Photography on Friday

Rare ‘super blood wolf moon’ takes to the skies this Sunday

Celestial event happens only three times this century

Arrest made after historic B.C. church hit by arson

The fire at the 150-year-old Murray United Church in Merritt was considered a possible hate crime

B.C. dangerous offender in court for violating no-contact order, sends letter to victim

Wayne Belleville was shocked to see a letter addressed to him from his shooter, Ronald Teneycke

Man blames his loud car radio, sirens for crash with B.C. ambulance

Tribunal rejects bid to recoup ICBC costs after crash deemed 100-per-cent his fault

RECALL: Salmon Village maple salmon nuggets

Customers warned not to eat product due to possible Listeria contamination

Most Read